What is the first step in producing a transgenic animal?
A. inject the desired gene(s) into a donor egg
B. transgenic organism produces offspring that have the desired gene which can then produce more transgenic offspring
C. implantation of a donor egg into the host mother
D. transgenic eggs are harvested from the surrogate mother
Answer: A
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Imagine you genetically engineered a neuron to produce voltage-gated Na+ and K+ channels that had the same opening times in response to a change in voltage. How would that change the recording above?
A. The peak voltage would be higher. B. The peak would occur over a longer period of time. C. The period of hyperpolarization would be longer. D. No action potential would be generated. E. Threshold values would increase.
An action potential begins in a neuron's trigger zone, the part of the axon adjacent to the cell body. When a neuron is at rest, this region's gated channels for sodium and potassium are ____
a. closed b. both open c. both open but inactive d. open only at gated sodium channels e. open only at gated potassium channels
Exhalation _____
a. is always active b. is always passive c. may be both active and passive d. compresses alveoli e. may be both active and passive, and compresses alveoli
Inflammatory lesions include ulcers, cellulitis, and ______.
Fill in the blank(s) with the appropriate word(s).